Реши уравнение (150-20):x=65,(x+4)×7=350
(150-20):x=65 130:x=65 x=130:65 x=2 (x+4)*7=350 (x+4)=350:7 x+4=50 x=50-4 x=46
(150-20):x=65 X=150-20 X=130 X=130:65 X=2 (150-20):2=65 (x+4)×7=350 X=350:7 X=50 X=50-4 X=46 (46+4)×7=350